ML13175
ML13176
UHF FM/AM Transmitter
Legacy Device:
Motorola MC13175, MC13176
The ML13175 and ML13176 are one chip FM/AM transmitter subsys-
tems designed for AM/FM communication systems. they include a
Colpitts crystal reference oscillator, UHF oscillator, ÷ 8 (ML13175) or
÷ 32 (ML13176) prescaler and phase detector forming a versatile PLL
system. Targeted applications are in the 260 to 470MHz band and 902
to 982 MHz band covered by FCC Title 47; Part 15. Other applica-
tions include local oscillator sources in UHF and 900 MHz receivers,
UHF and 900 MHz video transmitters, RF Local Area Networks
(LAN), and high frequency clock drivers. ML13175/76 offer the fol-
lowing features;
• UHF Current Controlled Oscillator
• Uses Easily Available 3rd Overtone or Fundamental Crystals
for Reference
• Fewer External Parts Required
• Low Operating Supply Voltage (1.8 to 5.0 Vdc)
• Low Supply Drain Currents
• Power Output Adjustable (Up to + 10 dBm )
• Differential Output for Loop Antenna or Balun
Transformer Networks
• Power Down Feature
• ASK Modulated by Switching Output On and Off
• (ML13175) fo = 8 x fref, (ML13176) fo = 32 x fref
• Operating Temperature Range - TA = -40° to +85°C
16
1
ML13175-5P
PLASTIC PACKAGE
CASE 751B
(SO–16)
CROSS REFERENCE/ORDERING INFORMATION
PACKAGE
LANSDALE
MOTOROLA
SO 16
SO 16
MC13175D
MC13176D
ML13175-5P
ML13176-5P
Note:
Lansdale lead free (Pb) product, as it
becomes available, will be identified by a part
number prefix change from
ML
to
MLE.
PIN CONNECTIONS
Osc 1 1
Figure 1. Typical Application as 320 MHz AM Transmitter
AM Modulator
Osc
Tank
1.3k
0.01µ
Coilcraft
150–05J08
0.165µ
S2
16 Imod
15
Out
Gnd
NC 2
NC 3
Osc 4 4
VEE 5
14 Out 2
13 Out 1
12 VCC
11 Enable
10 Reg.
Gnd
9 Xtalb
1
2
3
4
f/N
16
15
14
13
VEE
(1)
150p
Z = 50Ω
RFout
SMA
ICont 6
PDout 7
Xtale 8
(2)
VEE
RFC1
0.1µ
150p
5
6
1.0k
12
11
10
9
VEE
0.1µ
27k
VCC
S1
7
8
100p
(ML13176)
VCC
30p
(ML13175)
ML13175–30p
ML13176–180p
ML13175
Crystal
3rd Overtone
40.0000 MHz
0.01µ
0.82µ
1.0k
(3)
ML13176
Crystal
Fundamental
10 MHz
VCC
NOTES:
1.
2.
2.
2.
3.
3.
3.
3.
50
Ω
coaxial balun, 1/10 wavelength at 320 MHz equals 1.5 inches.
Pins 5, 10 & 15 are ground and connected to VEE which is the component/DC ground plane
side of PCB. These pins must be decoupled to VCC; decoupling capacitors should be placed
as close as possible to the pins.
The crystal oscillator circuit may be adjusted for frequency with the variable inductor
(ML13175); recommended source is Coilcraft “slot seven” 7mm tuneable inductor , Part
#7M3–821. 1.0k resistor. Shunting the crystal prevents it from oscillating in the fundamental
mode.
Page 1 of 16
www.lansdale.com
Issue cC
C
LANSDALE [ LANSDALE SEMICONDUCTOR INC. ]
